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A hydroplane (or hydro, or thunderboat) is a fast motorboat, where the hull shape is such that at speed, the weight of the boat is supported by planing forces, rather than simple buoyancy. A key aspect of hydroplanes is that they use the water they are on for lift rather than buoyancy, as well as for propulsion and steering : when travelling at ...
K-PRO (an APBA entry class) is the only PRO hydroplane class running modified, recreational outboard motors; all other PRO hydroplane classes use 2-stroke outboard motors designed and manufactured specifically for PRO circuit racing purposes. Entry level classes for the PRO series classes are gasoline-fueled K-PRO (APBA sanctions only) and OSY ...
In unlimited hydroplane racing, both were eventually supplanted by gas turbine engines, which exhibit even more favourable power-to-size and power-to-weight ratios. [17] Some of the most significant Merlin-powered hydroplanes include: [citation needed] Slo-mo-shun V (from 1954 on, 1954 Gold Cup winner, first for Merlin power)
H1 Unlimited is an American unlimited hydroplane racing league that is sanctioned by the American Power Boat Association (APBA). Until 2009, the series was known as ABRA Unlimited Hydroplane, in turn renamed from APBA Unlimited Hydroplane in 2004. The H1 Unlimited season typically runs from July through September, consisting of five races.
In this file photo members on a Water Follies rescue sled wrestle a tree stump from the Columbia River during the one-day Spring Testing event for race boats team preparing for the 2022 season.
Already starting with a low number of six unlimited hydroplanes, the fleet was pared to four after Saturday’s events. It started with the U-3 Grigg’s presents Miss Ace Hardware, driven by ...
2 p.m. — Grand Prix hydroplane Heat 3. 2:25 p.m. — The Truss Company H1 Unlimited hydroplane Heat 4A. 2:50 p.m. — The Truss Company H1 Unlimited hydroplane Heat 4B. 3:15 p.m. — E-350 ...
The APBA Gold Cup (originally known simply as the Gold Cup, a speedboat race) is an American hydroplane boat race, named for the American Power Boat Association. It is now run as part of the H1 Unlimited season. [1] First run in 1904, it is the oldest trophy in motorsports. [2]